Trane CGAM Installation & Operation Manual page 73

Installation - Electrical
When configured for Dual Pump Fixed Speed, the CH530
will swap pumps on detection of a fault (if installed), or
when a flow loss or overdue event occurs. It will also
switch pumps each time the overall pump request is
removed and re-engaged, unless a fault is detected on one
of the pumps. If faults are detected on both pumps, the unit
will be shut down.
In addition to the factory installed flow switch, a field-
supplied auxiliary contact is required, so that the chiller
will only detect flow if a pump is running and the flow
switch says flow is present.
Chilled Water Pump Control - Optional
Pump Package
When factory installed pump package option is selected,
the chiller MUST control the pumps. See
Pump Control, " p. 72.
Table 37. Alarm and Status Relay Output Configuration Table
Description
This output is true whenever there is any active diagnostic that requires a manual reset to clear, that affects either the
Alarm - Latching
Chiller, the Circuit, or any of the Compressors on a circuit. This classification does not include informational diagnostics.
This output is true whenever there is any active diagnostic that could automatically clear, that affects either the Chiller,
Alarm - Auto Reset
the Circuit, or any of the Compressors on a circuit. This classification does not include informational diagnostics.
This output is true whenever there is any diagnostic affecting any component, whether latching or automatically clearing.
Alarm
This classification does not include informational diagnostics
This output is true whenever there is any diagnostic effecting Refrigerant Circuit 1, whether latching or automatically
Alarm Ckt 1
clearing, including diagnostics affecting the entire chiller. This classification does not include informational diagnostics.
This output is true whenever there is any diagnostic affecting Refrigerant Circuit 2 whether latching or automatically
Alarm Ckt 2
clearing, including diagnostics effecting the entire chiller. This classification does not include informational diagnostics.
Chiller Limit Mode (with This output is true whenever the chiller has been running in one of the Unloading types of limit modes (Condenser,
a 20 minute filter) Evaporator, Current Limit or Phase Imbalance Limit) continuously for the last 20 minutes.
This output is true whenever any compressor is running (or commanded to be running) on Refrigerant Circuit 1, and false
Circuit 1 Running
when no compressors are commanded to be running on that circuit.
This output is true whenever any compressor is running (or commanded to be running) on Refrigerant Circuit 2, and false
Circuit 2 Running
when no compressors are commanded to be running on that circuit.
This output is true whenever any compressor is running (or commanded to be running) on the chiller and false when
Chiller Running
no compressors are commanded to be running on the chiller.
Maximum Capacity This output is true whenever the chiller has all compressors on. The output is false once one compressor is shut off.
Relay Assignments Using TechView
CH530 ServiceTool (TechView) is used to install the Alarm
and Status Relay Option package and assign any of the
above list of events or status to each of the four relays
provided with the option.The relays to be programmed
are referred to by the relay's terminal numbers on the LLID
board 1A18.
The default assignments for the four available relays of the
CGAM Alarm and Status Package Option are:
Table 38. Default Relay Assignments
Relay
Relay 1 Terminals J2 -12,11,10:
Relay 2 Terminals J2 - 9,8,7:
CG-SVX17E-EN
"Chilled Water
Compressor Running
Latching Alarm
Alarm and Status Relay Outputs
(Programmable Relays)
A programmable relay concept provides for enunciation of
certain events or states of the chiller, selected from a list of
likely needs, while only using four physical output relays,
as shown in the field wiring diagram.The four relays are
provided (generally with a Quad Relay Output LLID) as part
of the Alarm Relay Output Option.The relay's contacts are
isolated Form C (SPDT), suitable for use with 120 VAC
circuits drawing up to 2.8 amps inductive, 7.2 amps
resistive, or 1/3 HP and for 240 VAC circuits drawing up to
0.5 amp resistive.
The list of events/states that can be assigned to the
programmable relays can be found in
will be energized when the event/state occurs.
Table 38. Default Relay Assignments
Relay
Relay 3 Terminals J2-6,5,4:
Relay 4 Terminals J2-3,2,1:
If any of the Alarm/Status relays are used, provide
electrical power, 115 VAC with fused-disconnect to the
panel and wire through the appropriate relays (terminals
on 1A13. Provide wiring (switched hot, neutral, and
ground connections) to the remote annunciation devices.
Do not use power from the chiller's control panel
transformer to power these remote devices. Refer to the
field diagrams which are shipped with the unit.
Table 37.The relay
Chiller Limit Mode
Warning
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